Everything can be connected to a USB port – we already know that. USB gadgets can be useful, but they are mostly stupid and fun. Here are 5 USB gadgets for your amusement:

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USB Mini Aquarium Toy – Make your workspace more soothing and entertaining with this USB mini aquarium. When powered on, the fish swim around. Also has a color-changing LED light, making it useful as a nightlight as well.

Combining personal GPS navigation and real-time Points of Interest (POI) with Internet based entertainment and full web browsing, the easily portable and pocketable Clarion MiND Mobile Internet Navigation Device provides rich GPS navigation with full PC-like Internet browsing capabilities thanks to its 4.8-inch, 800 x 480-pixel touchscreen. You can connect to the Internet via Wi-Fi at home, in the office or via hotspots out and about in the city. The Clarion MiND also allows for Internet connectivity via Bluetooth when paired with a mobile phone.

This next-generation mobile device uses the power of Intel’s Atom processor, and it also features a 4 GB internal memory, MicroSD memory card slot for expansion, built-in speaker and headphone jack, USB connectivity, and a rechargeable battery that provides up to 1.3 hours of continuous use. It’s pre-installed with complete mapping and points of interest (POI) coverage for the U.S. and Canada from Navteq and you can easily use Google Maps for additional searching.

The Liquid Image VideoMask has an integrated waterproof digital video camera which photographs at 5 Megapixel. It can operates till a depth of 33′ and eliminates the need to carry an underwater camera. Ideal for scuba diving, spear fishing, free diving and snorkeling.

The Mimo Mini USB Monitor changes this equation completely by offering a low-maintenance relationship between you and an extra display. A single USB connection from your computer gets you an instant high-resolution secondary display.

This awesome display is perfect for your IM client, widgets, PC gaming tools, your email, a spreadsheet, your PhotoShop tools, or even video! Not only do these displays enhance productivity, they look great! The single USB connection, combined with a weight of only 1.3 pounds, means the Mimo monitor is ultra portable and cost-effective, as no expensive extra video cards are required.

Small, virtually weightless and with huge storage – USB flash drives are very useful. You can use them for backup, copying files from one computer to the other – and more.

Here are 5 cool USB flash drives (AKA Disk on Key):

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LaCie 4 GB iamakey USB Flash Drive – The key-shaped design is functional and memorable, and the protection that the LaCie iamaKey offers makes it extremely reliable. Best of all, with its 4GB and 8GB models, you can fit an enormous amount of data in a small flash drive.

USB Memory Brick Thumbdrive – With these USB Memory Brick Thumbdrives, they’ve taken a regular brick and inserted a 4 Gigabyte piece of USB flash memory. Now you can store millions of pages of text, thousands of images, hundreds of songs, or 10 hours of movies.

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USB 8GB Flash Drive Lighter – This flash drive has an ample 8GB capacity and the lighter is refillable. The USB connector slides out of the bottom of the metal case, using a small slider lever located on the side of the lighter.

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Ironkey Military Strength Flash Drive – For those of you who are really keen on security – this is the perfect USB drive. Like you, the US Military wanted portable but secure storage, and the guys at IronKey stepped up. They’ve developed the perfect solution that’s one-part thumb-drive, and two parts Mission: Impossible. Their thumb drives hold up to 8 Gigabytes of data, but includes a hardware encryption chip that scrambles the data so as to be completely unreadable without a password. More info here.

Sleek and stylish, Toshibas 2.5 Inch External HDD captures the essence of todays fast paced digital lifestyle. It is the must have accessory for a new mobile generation of consumers who take their digital work and entertainment wherever they go. And Toshiba lets them do just that. With 250GB, they can take thousands of songs, pictures, movies and work files on the road. Quickly, easily, and securely.Technical Details

In addition to displaying the time, this watch helps you carry your valuable data with you at all times (you know – your MP3 files, favorite images and more). With either 2GB or 4GB of capacity it has more than ample storage space.

The USB Memory Watch has a built-in USB connector and can transfer files to and from most computer operating systems. The USB connector is cleverly stored in the watch band and flips up for easy connecting. There is also a LED light that indicates the device status. The watch is surprisingly sleek and lightweight – it is not a bulky watch. The band is comfortable and very flexible.